 Biggest thing, right? And if you compress it, insulation works off of the fluff, right? That's the air that's in between. And when you smash the insulation, you lose part of your R value. Yes. So you could go right back to R19, right? Yes. Yeah. Defluffification is a major issue. Well, if you filled up your attic and then you went up and put three-quarter plywood all over it and smashed it all down, that's exactly what you've done. That's exactly right. Going back to 1980. Yeah.